Improved lifting-jack



@met @Mire JAMES VB. AUsBoURNE, 0E MILWAUKEE, W'IsOoNsIN, ASSIGNOR To HIMSELF ANDHIRAM MALLGRY, 0F SAME PLACE.

Letters Patent No. 93,512,datell August 10, 1869; antef'lated August 5, 1869.

The Schedule referred to i these Letters Patente-nd m'akng'ba'rt bf the same.

To all whom it may concern.

Be it known that JAMES B. AUsBoUnNE, of the city and county of Milwaukee, and State of Wisconsin, have invented a new and useful Improvement in I .ifting-Jacks; and I do- -hereby declare that the foL lowing is a full, clear, and exact description thereof, whichwill enable those skilled i'u'the art to make and use the sanne, reference being had to the accompanying drawing, forming part of this specification, in which- Figure l is a view of the jack, set ready for lifting a load, with the opelating-lever on the back side.

Figure 2, a view of the jack in' position, when the load is lifted, with the operating-lever on the front side.

Similar letters of reference, in each of tlxe.ligures, indicate corresponding parts.

The object of my invention is to produce a simple machine, of great power, for lifting loads in an expe ditious manner.

A, the fnlerum-stamlard.

B, the lifting-beam.

C, operating-lever.

D, cheek or jaw, forming a part of the fiame oppo site lever O, through which pass bolts, as shown.

This cheek 1) is bound with metal, and thecnds of the fulcrum A, beam B, and lever C, are also metal bound when the jael; is made of wod; when made of.

raise the load, moving, as shown iu the red dotted.

lines, till it assumes the position shownin fig. 2, the beam B resting one end on the ground and the other ou fulcrum A, where it will remain without the necessity of using any fastening to keep-it there.

When the load is to be lowered, take hold of lever C, draw it back, as shown in the dotted lines in fig. 2, till it is backzo the position shown in fig. 1.l

W'liat I claim as my invention, and desire to secure by Letters Patent, is-

A lifting-jack, consisting of fulcrum-post A, lifting- .beam B, lever C, andcheek D, when constructed to operate substantially as described.

' JAMES B. AUSBOURNE.

Witnesses:

PEBUY B. SMITH, FRANCIS BENINGHAUSEN. 

